A corposa



P. P. GILLES.

VACUUM FEED CARBURETER.

APPLICATION FILED SEPT. Is. 1919.

Reissued July 13, I920. 1 4, 9 1 2.

3 SHEETS-SHEET I.

P. P. GILLES VACUUM FEED CARBURETER.

APPLICATION FILED SEPT- 16. 1919.

'Reissued July 13, 1920.

0. 7 el/I7 APPLICATION-FILED SE PT- l6, I919.

'Reissued July 13, 1920.

I ,which the following is a specification.

to fuel JUNITEDISTATES *PATENTu o ICE. I

PIERRE P. GILLES, oronicaeo, i Lmois, assreivoa, BY mEsNEAssIem/rnNTs ro err-1.11s FUEL'FEEDING COMPANY, or HOLYOKE, MASSACHUSETTS, acoaroae- TION OF MASSACHUSETTS.

. WTAC'UUM-FEED ICARBURETER.

Original No. 1,246,842,

To all whom it may concern.

Be it known that I, Pmlmn P. GILnEs, a

citizen of the United States, residing at Chi- I cago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Vacuum-Feed Carbureters,'of

This invention. relates generally feeding devices for supplying fuel to carbureters by suction from a low level supply tank. Morepar'ticularly, the invention .is concerned with a consolidation of the carbureter with the vacuum feed fuel supply device into a unitary structure which may be termed a vacuum feed. carbureter. The.1n-

vention also relates to improvements in fuel feeding devices of the type disclosed in my ,copending application. Serial No. 101,755, 'filed June 5, 1916.

An object of the invention is to provide a 'vacuum feed carbureter, comprising a fuel supply chamber, having a float therein and devices controlled by the float to draw fuel into the chamber, and a carbureter fuel chamber fed from the. supply chamber by gravity together with suitable atomizing devices in the carbureter chamber and adapted to be fed directly therefrom, the construction being characterized by the provision of a single float which controls the fuel level in both chambers.

Another object of 'the invention is to provide in a fuel feeding device for carbureters,

a a fuel-supply chamber having a float thereln and float controlled means fordrawing fuel by suction into the chamber, a carbureter fuel chamber connected to the supply chamber to be fed therefrom by gravity, a valve to control the connection between said chambers, and means operable by rise and fall of the float to open and close said valve.

Another object of the invention is to provide in a fuel feeding device for carbureters,

a suction passage communicating between the feeding device andthe suction pipe of the carbureter,1and means to vary the efi'ec-. tive opening of said passage in proportion to the effective opening of the suction pipe.

Another object is to provide in a fuel feeding device for carbureters, a passage which constantly communicates the intake mani-' fold with the fuel supply chamber and I Specification of Reissued Letters Patent. Reis ed J l 13 192 dated September 25,1917. Serial No. 124,521, filed October 9, 1918. Application for reissue filed September 16, 1919. Serial No. 324,241.

means for controlling said passage tocontrol thefuel delivered to said chamber.

Other objects and advantages will appear in the following description and will be particularly pointed out in the appended claims.

One preferred embodiment of the invention is shown for illustrative purposes in the accompanying drawings, in which Figure 1 is a top plan view of the vacuum I feed carburetor; Fig. 2 'is a sectional elevation thereof taken on the line 2'2'of Fig. 1;

Fig. 3 is an enlarged fragmentary plan 'view of the-cover;

Figs. 4. and 5 are sectional plan views taken on the lines 44' and 5-5, respectively, of Fig. 2;

Fig. 6 is a partial sectional elevation taken on the line 6 -6 of Fig. 4;

Fig. '7 is a fragmentary sectional plan view taken on the line 77 of Fig. 6;

Fig. 8 is a sectional plan view taken on the line 8-8 of Fig. 2;

Fig. 9 is a partial sectional elevation taken on the line 9'9 of, Fig. 1;' I

Fig. 10 is a sectional elevation taken on the line 10-10' of-Fig. 45; i

Fig. 11 is aview similar to Fig. 9 showingd the partsin a different relative'position; an I tion taken on theline l2' .l2-of Fig. 1.

Referring to these drawings, the carbureter casing, as Shown 'in'Figi 2, comprises three sections, a top section 15,1anintermediate section 16, and a base section 17. These several sections are held together by three rods 18 (Figs. 1, 2 and 4) which are threaded into section 17 to pass upwardly through sections 16 and 15 and areprovided with Fig. 12 is a fragmentary sectional elevasuitable nuts to engage'the upper face of' the latter and by a pairof rods 19 similarly threaded into section '17 which pass upwardlyithroughlugs on section 16, as shown in Fig. 10, and are provided with nuts to engage the latter. The described arrangement is preferred since it permits convenient assembly of parts. These sect ons, when assembled, form a closed casing, having'two Separate chambers 20 and 21 'arranged side by side in adjacent relation. The top section l 15 tegral 15 is provided with a hinged cover 22, which I permits convenient access to chamber '20,

and the cover is normally locked by a latch.

23,.spring pressed into enga ement witha suitable notch in section 15. hole 24 therein to receive a suitable key (such as a half round piece of'steel, forex ample), and latch 23 has a'notch 25 therein to /receive the lower end of the key,whereby I the latch may be retracted in .an obvious manner to unlock cover 22.

Chamber constitutes a carbureter fuel chamber and extending horizontally therethrou h isa suction pipe 26 which is informed with section 16 and has a flange end as shown adapted for connection to'the' intake manifold of theenginer An integral sleeve 27 depending from'pipe 26 registers with an upwardly extendingsleeve- 20 28 integrally formed with section 17 so that a continuous passage is formed which extends from the base of the carbureter to the suction pipe, aslshown in Fig. 2. A tube 29 extends from a point above the suction pipe 26 through the latter and into the 'passage in sleeves 27 and 28. Theflower: portion -of the tube 29 is of reduced diameter, and the bore of member 28 is correspondingly V formed, so that the tube 29 may seat, as

30- shown-in Fig. 2, in member'28. Threaded into the baseof tube 29 is .a spindle 31 which extends upwardly within tube 29 to substantiallythecenter of-pipe 26 and is formed with an axial passage 32. The spindle 31 is.

35. so constructed, asshownin Figs. 2 and ,5, as to form an annular passage 33 between it t and the interior of tube 29.which passage is closed off at the base by the threaded portion of the sleeve. The upper portion of 0 spindle 31 is squared asshown 1n Fig. 5, so'

that it may engage the tube 29 for centering purposes without closing off communication, with passage 33. Abovespindl'e 31, the tube 29 has openings 34 (Figs. 2 and 5) communicating with pipe 26, Fixed to tube 29- at the top thereof is a disk 35 which is drilled to receive a pin 36 fixed .in the upper u portion oflpipe'26, as bestshown in Fig. 2.

v hreaded into the upper portion of tube 29 a'needle valve 37 which cocperates with spindle 31 to vary the effective outlet opening of passage 32.- The latter forms the -main nozzle, and the passage 33 the compensating nozzle, and both are arranged to 515 deliver through the "openings 34 intopipe 26.

It isto be noted that the sleeve 29 with q indle '31" and valve 37 therein may be withdrawn vertically when cover 22 opened, a spring 38 on the'latter being pro- 60 vlded to engage valve 37 to hold it and thus tube-29 in position. The pin 36'serves to prevent rotation of the latter and insures correct angular positioning of the tube 29 within members 27 and Y28 for a reason later 05 to appear.

over 22 has a a horizontal passage 60 and a short vering control described. Air is admitted to an annular space 62.,th1ougha hole .63 (Fig. 10) insleeve-1347 which is caused to register by mea'nsiof pin 51 and disk 50 with a lateral 1 30.

In order to permit fuel from the carbureter chamber 20 to pass to the main nozzle, a transverse'passage 39 (Fig. 8) is formed in the base of section 17 which communicates with the space in member 28 below the members 29 and 31,- as shown in Fig. 2. A vertical hole 40 (Fig.8) communicates between the chamber 20 and passage 39. The lowerportion 30 of sleeve 29 has an opening 41 therein which, by reason of pin 36 and disk 35 is caused to register with a passage 42 (Figs. 2 and 8) arranged at right-angles to passage 39 as clearly shown in Fig. 8. An opening 43 permitslfuel to flo'w, from chamber 20 into'passage42, and this 0. ening may be varied by a needle valve 44, w ich is suitably mounted ina. lug in section 16 and has a knurled head disposed just beneath cover 22 for convenient actuation, as shown in Figs. 2 and 10. A vertical passage 45. (Fig- 2?), communicating with the float'chamber a ove the level of fuel therein, communicates with passage 42, and passage 45 is arranged to supply air laden with fuel-vapor to the compensating nozzle 33.

-A thirdnozzle, commonly termed .aslow speed nozzle is arranged in an exterior 01'- tion of sections 16 and 17, asshown in igs.

- 6 and 10. This nozzle comprises a sleeve 47 into the upper part of which is threaded a valve stem 48 having a knurled head at its cupped out, as shown in Fig. 6 and, leading axiallyupward from the cupped'out portion, 1s a passage 54 which communicates with alateral passage 55 leading to an annular space 56 between thesleeve 47 andllu n stem 48. integral flange 57 formedon the stem closely fits the interior of sleeve 47 and closes the annular space 56. Threaded into the base of sleeve 47 is-a-member 58' which has a' frusto-conical upper end to matein the-cupped end of stem 48 and an axial passage 59 of, small bore .through which fuel may pass'to the annular space 56. Thespace below member 58 is connected tical passage 61 to the.described passage 42, as shown in Figs." 2' and 10. The upper end of member 58 and the lower end of stem 48 constitute a valve 'to control the infiow of. air to the passage 54, the inflow of fuel be- 125- ed by the needle valve 44 already descri ed. Referring to 52 already the upper end of air passage 52 is connected by .rectangularly arranged and horizontally disposed passages 65 and 66 to the air space of the carburetor fuel chamber 20, whereby passa e 64 leading to the assa e T) Tig .airladen with fuel vapor may pass to the annular space 62 and thence upwardly with fuel from passage 59 into the annular space 56. The latter delivers into suction pipe 26.

by means of a hole 67 in sleeve 47 and a lateral passage 68 formed in section 16, as

shown in F igs- 5 and 6. The slownozz le described is particularly advantageous not only on account of'simplicity of construction but also on account of its convenient removability.' The sleeve 47 may be lifted vertically from its seat when cover-22 'is opened without disturbing the adjusted relation of the several parts therein. Thus,

it may be readily withdrawn for cleaning,

inspection, and adjustment for it is held in its seat simply by the spring 19.

The chamber 21 above described is a fuel supply for the .carbureter chamber .20 and means are provided'in the chamber 21' for drawing fuel by suctionfrom a low level supply tank. Referring to Figs. land 12',

reference 70 indicates a fuel inlet attachment adapted to be connected to the low level supply tank. A 'bolt 103 having a tapered surface, to engage a correspondingly tapered surface onmember 70 is threaded I into cover 15, as shown in F ig. 12. The

lower end of member has a tapered seat in cover'15, the construction being such that member 70 is threaded into cover15, as shown in Fig. 12. The'lower end of member 70 has a tapered seat in cover 15, the construction. being such that member 70 is held to the cover by a swivel joint.

Member 7 0- permits fluid to pass intothe air space. of chamber 21 when a ball valve 104 is opened. A spring 105 normally holds the ballagainst its seat but permits the opening of the latterwvhen suction is applied to chamber 21 by means to be described. Cover section 15 has an upwardly extending boss which is forinedwith axially alined passages 71, 72 and 73 of progressively increasing diameter. -The passage 73 has lateral openings 74: which communicate with the atmosphere and is closed at the top .by a cap 75.

A passage 76 connects the passage .72 with the air space of the chamber 21.. 'Loosely fitting andslidable in the passage 71 is a valve stem 77 ,the upper end of which. is

necked down toreceiveavalve 78. The la tter is-adapted to-c'lose the atmospheric connection to passage 76 by seating on the shoulder formed by .the intersection of passages 72 and 73 -'when stem 77 is depressed by means to be described: Itis particularlyto be noted that valve 78 is movablerela: tively to stem 77, because of a loose fit there with, as will be seen from a comparison of F i s. 9 and 11, so that it may close slightly be ore stem 77 is in its lowermost position and may open shortly after the stem begins to lift. Stem 77 is supported by a leaf spring79 which is fixed at its ends to posts 80 secured to cover section 15.

Threaded into stem 77 is a rod 81 which extends downwardly and is guided in a boss formed in the base section 17. Spring 79 is thus clamped between stem 77 and rod 81 and is arranged to move. the stem and rod sharply by snapping from its upwardly curved position shown in Fig. 2 to a similar downwardlycurved position when actuated by suitable means. The actuating means comprises a'fioat 82 loosely encircling rod .81, as shown in Figs. '2 and 4. Pivoted in .posts- 83, depending from cover 15 and on each side of rod 81 are levers 84 which extend in opposite directions oneach side of the stem and have projections 85 extending into thepathof either of two spaced.

flanges 86 formed .on rod 81, as best shown in'Fig. 4. The free ends of levers 84 areconnected by links 87 to the top of fioat 82. .It will be' seen that as the latter falls, levers 84 .are broughtto bear on the lower flange 86 and, when they have moved the latter a distance slightly greater than half the throw of springv 79, the stem 77 will be sharply moved the remaining distance by sage 90. A- valve 91 is slidably mounted in pipe 26 and is arranged to close the intersection of passages 88 and 90. Valve 91 is held pressed against the cam 93 by a spring acting between the interior of pipe 26 and a collar 92 on the. valve stem. Collar 92 is throttle 89 opens and so that the effective opening. of the suction .passage 90 is varied in proportion to the effective. opening inv arranged in the .path of a cam 93 formed 1 on'the throttle'and the contour of this cam is such as' to cause valve 91 to open as suction pipe 26. Passage 90 is connected by vertical and horizontal passages 94 and 95 (Fig. 9), respectively, to the passage 71 within which-stem 7.7 is slidable. The latter has a re ess normally positioned asv in Fig. 9 so that only a relatively small area of communication is presented between suction passage 95 and the air space of chamber 21. When, however, valve 78 is closed, stem 77 and recess 96 are positioned as in Fig. 11'

to allow anunrestricted suction opening into chamber 21. The. spring 105 heretofore described has suflicie'nt tension 'to hold valve venient access when cover 22 is opened. At

' assumes the same level.

whereby air may enter chamber 21 to place the fuel fed therefrom. The chamber 21 is always incommunicationithrough the 104 closed when'recess 96 is positioned as v i shown inFig. 9, but permits the opemng of the valve when the recess is positioned asin Fig. 11' so that a'relatively strong suction is applied to chamber 21. a

The latter feeds chamber. 20 by gravity through an opening 97 formed in the base section 17 and a pivoted and counter-balancedvalve 98 (Figs. 2 and :8) controls this opening. A stem 99 extends from valve 98 into chamber21 and its end lies between a pair of flanges 100. formed on rod 81.- Normally valve 98 is positioned as shown to permit fuel to pass from .the chamber. 21 to chamber' 20. When, however, spring 79 is moved to its lower position,=rod 81 is depressed and valve 98 positively closed to stop the flow to chamber 20-until the float 82 a ain rises. Valve 98 performs the function 0 the usual check valve, but in addition is positively opened and closed without relylng upon the difference in level in the two chambers to effect its actuation. Valve 98 may be held in closed position when desired by a rod 101 vertically mounted in chamber 20 and having its upper part arranged for conthe lower end of rod 101 a bent portion 102 is provided which may be brought to bear on valve 98 when the rod is turned substantially ninety degrees from the position illus-' trated.

In the voperation of my invention, the rod 101 issuita'bly turned to release the valve plate 98, and the fuel in the two chambers The normal level of fuel is shown-by the line a-a in Fig. 2. As'fuel is consumedin the chamber 20 by the-several atomizing devices described it is replaced fuel from chamber 21. ormally valve 78 lies in the position sheiwn passage 95 with the engine intake manifold but this passage is normally restricted by' the rod/77 since the recess 96 is raised as shown in Fig. 9. The valve 78 is also normallyopen and in. communication with the passage 95 as well'aswith the chamber 21 so that the "suction in the intake manifold is not communicated to the chamber 21 until the valve 78 is closed. After the fuel in,

chamber'21 hasfallento a given level, valve 78 is suddenly closed to shut off the airsupply to chamber 21, and the suction through passage "95 creates a partial vacuum in chamber 21 openingvalve 104 and causing fuel to be drawn into, the latter through the inlet attachment 70.' As soon as chamber 21 is filled-toga predetermined'level, valve 78Iis sharply raised from its seat permitting air to te'n't erQthe chamberto stop the flow through attachmentand valve 104: is fib sharply closed by spring 105. Valve 98'- automatically closes during the period of inflow to prevent fuel from chamber 20 from returning to' chamber 21. It is to be.

noted that the usual manner of check valve operation is not alone relied uponbut a supplementary means positively. operable from float-82 is provided tolnsure' cor rect operation of valve 98. Valvej91 isar ranged to open in proportion to the throttle opening so that when the engine is running at slow speed and little fuel is drawn from chamber 20, the continual suction of air from chamber 21 is reduced at. a time when little suction is necessary. The valve 91 has the advantage that'thesuction through passagef95 is varied approximately to the fuel consumed so that, at-times' of heavy duty,

the suction effective to feed chamber 21 is at a maximum, while on small loads when little fuel is required, the valve 91' is nearly closed. v

p The main, compensating, and-slow speed nozzles, comprising the passages 32, 33 and 56, respectively, operate in the usual manner to deliver fuel in pipe 26. For a more detailed description of the manner of operation of these nozzles reference is made to m copending application Serial No.

- 101,755, filed June 5, 1916.

An important and advantageous feature of the construction described is in the provisionof a single float to control the level in the two chambers. Heretofore, the vacuum feed chamber has been connected (usually through an intermediate chamber) to the fuel chamber of the carbureter which unnecessary multiplicity of parts.- Instead of' several independent units arranged at different points and requiring several pipe connections, a single unit is here provided which requires attachment to the engine manifold and a single pipe connection from the supplyv tank. The vacuumifeed device is preferably a unitary structure with the carburetor and all the working parts are located in a single casing for convenientaccessibility.

The invention has been described in one preferred form for illustrative purposes, but the scope of the invention is defined .by the '115 carbureter without elaborate structure and appended claims rather controlled by a single float.

than by the foregoin description.

Vhat I claim is- 1. A vacuum feed carbureter, comprising a carbureter fuel chamber, atomizing devices in said chamber, adapted to be fed thereform, a fuel supply chamber communieating with the carbureter chamber to feed the latter by gravity, a valve controlling the communication between said chambers, a float in the supply chamber, means controlled by the float to draw fuel into. the

supply chamber, and means operable by the rise and fall of the float to open and close said valve, all constructed and arranged so that the level in both of said chambers is 2. The combination with a carbureter hav- 'ing atomizing devices and a fuel chamber to directly feed the latter of a supply chamber adjacent the fuel. chamber and communicating therewith 'to permit fuel to pass frointhe supply to the fuel chamber by gravity, a valvefcontrolling the'communication between said chambers, a float'in the supply chamber, devices controlled by move ment of the float to draw fuel into the supply chamber, and' means operable from the float to open and close said valve, all constructed and arranged so thatfuel is fed to the supply chamber by suction and-so that the fuel level in both chambers is controlled by a single float.

3. A vacuum feed carbureter,comprising a casing formed with a carbureter fuel chamber and a fuel supply chamber and a passage connecting the chambers near the base thereof, an air intake pipe associated with the carbureter chamber and adapted for connection to suction means, 'atomizin'g I devices connected with the carbureterchamfuel to the latter from the carbureter chamber, a float in the supply chamber, a fuel ber and extending within saidpipe to feed supply connection-to-the latter, and-suction means controllablebythe float to draw fuel from said connection into the supply cham-- ber, the latter adapted to feed the carbureter chamber by gravity, all constructed and arranged so that the float controls the level in both the supply and carbureter chambers.

4. A vacuum feed carbureter, comprising,

, a casing formed with a carbureter fuel chamber and a fuel supplychamberg -a connection between the chambers arranged to permit fuel to pass from the supply to. the carbureter chamber by gravity, a valve "in said connection, .a fuel supply connection to the supply'chamber, a float in the latter, de-.

vices controllable'from the float to ,.draw fuel into the supply chamber and means operable from the float'to open and close said valve- 5. A fuel feeding device for ea rbureters,

comprising a single casing formed with a carbureter fuel chambervand a fuel supply.

- chamber, a connection between said chambers arranged to pcl'mit fuel to pass from the latter to the former, a valve in said connection, a fuel supply connection to the supply chamber, a float in the latter, an air inlet to the supply chamber, a valve in said inlet operable by said float, an air intake pipe "passing through the carbureter chamber and I ber,'a fuel passage connecting the-latter to' the fuel. supply chamber, a valve in said passage, and means operable by rise and fall of the floatto suddenly open and close said valve. I

7. In a fuel feeding device for a carbu reter, a fuel supply .chamber, a carbureter fuel chamber, a connection between the chambersto permit the former to feed the latter, a fuel supply connection to. the sup ply chamber, a suction pipe-associated with the carbureter chamber, a passage from said pipe to the air space of the supply chamber, means in said pipe-to vary the effective opening therein, a valve in said passage op erable from said means and constructed and arranged to be opened inproportion to the effective opening in said pipe. I I 8. A vacuum feed carbureter, comprising a casing formed with a fuel supply chamber and a carbureter fuel chamber, a suction pipe, a throttle valve in said pipe, a

passage connecting the latter to the air space of the supply chamber, a valvein said be varied. in accordance with the effective 12:0

opening in the suction pipe.-

9. The combination in a fuel feeding de-v vice'for carburete'rsof a su ply chamber, a' carbureter fuel chamber, a connection be tween the chambers to permit the former tofeed the latter, a float in the'supply cham--- "ber, an air inlet and a fuel inlet thereto, a:

valve in the air inlet arranged to be opened and closed by the rise andfall. of saidfloat, asuction. pipe, a throttle valve therein, a 139 passage leading from said pipe to the air space of the supply chamber, and a valve -'in said passage arranged to be opened and closed by the opening and closingof 'the throttle valve andto varythe effective suction opening to the fuel supply chamber in proportion to the efl'ectiveopening in the suction pipe.

10. In a fuel feeding device for carbureters, a fuel supply chamber, a float therein, an air inlet to the supply chamber, a valve in said inlet operable to open and close the latter by rise and fall of the float, a suction pi e, apassage from the latter to said cham er, a valve in said passage, a

a valve in said pi e operable to vary the effective opening 0 'the suction passage valve, a fuel. suppl of'said cham r, a valve in said connectlon and resilient means normally ,holdingthe last-named valve; in closed position, all-constructed' and arranged so that the valve in said connection may be opened by relatively strong suction and closed at times of relatively weak suction by said resilient means.

11. In a fuel feeding device-for carbu= reters, a fuel supply chamber,'a float therein, an air inlet to the supply chamber, a valve in said inlet operable to openand close the latter by rise and fall of the float, a passage communicating withthe ai'r space of said chamber and adapted for connection to suction means, a fuel supply connection to'the' air space of sald chamber, a valve in said connection, and resilient means normally holding the last-named valve in closed position all constructed and arranged so thatthe last-named valve may beopened b tively strong suction and closed at times of float to suddenly open saidvalve.

relatively weak suction by said means.

12. A vacuum feed'carburetel, comprising a'fuel supply.- chamber, a float therein, means controlled by the float operable to draw fuel into said chamber, a carbureter'v fuel chamber, atomizing devices therein, a fuel passage connecting the carburete'r fuel chamber. to the fuel supply chamber, a valve in said.

passage, and means operable .by rise of the 131 A vacuum feed'carbureter, comprising a fuelsupply chamber, a float therein, means controlled by'the float operable to draw fuel into said chamber, a carbureterfuel cham ber, atomizing devices in the latter, .a fuel passage connecting the last-named to the first-named chamber, a valve in said passage,

and means operable by the falling of the float to suddenly close said valve.

14. Ina fuel feedin devicefor a carbureter, a fuel supply (:Eamber, a carbureter fuel' chamber, a connection between the chambers to permit the former to feed the latter, a fuel supply connection to the supply chamber, a suction pipe associated with the carbureter chamber, a' passage from said connection to the air space relapipe to the air space of'the supply chamber, means in said pipe to vary the effective opening therein, a valve in said passage operable from said means and constructed and ply chamber, a suction pipe associated with the carbureter chamber, a passage from said pipe to the air space of the supply chamber, means in said pipe to vary the effective opening therein, a valve in said passage operab from said'means and constructed and arranged to'b'e opened in proportion to the effective opening in said pipe, a float in the fuel supply chamber, and a valve in said passage normall openin to the air and operable by said oat to c ose the opening tothe air and, render the suction operative through the assage to drawfuel into the fuel su ply c amber.

16. n a fuel feeding device. for a-carbureter, a fuel supply chamber, a fuel supply connection to the fuel supply chamber, an-engine intake pipe, a passage from said pipe to the upper part of the fuelsupply chamber, i'neans in said'pipe to vary the I effective opening therein, a valve in sald passage .associated"with said means and adapted to be opened in proportion to the opening insaid pipe.

1 7. In* a fuel feedin device for a carbureter, a fuel supply c amber, a fuel sup- I ply connection to the fuel supply chamber,

an engine intake pipe,'a passage from. said I pipe tothe upper part of the fuel supply chamber, means said pipeto vary the effective opening therein, a valve in said passage associated with said means and adapted. tobe opened in proportion to the opening in said pipe, a float' in the fuel supply chamber and a valve in said passage normally opening to the air and operable by said float to close the opening tothe air and render the suction operative through the passa e to draw fuel into the fuel supply cham er.

. .18.-In a fuel feeding device for a car- 'bureter,-a fuel supply chamber, a fuel supply connection to the fuel supply chamber,

an engine intake pipe, a passage from said pipe to the upper part of the fuel supply chamber, said passage communicating said chamberand pipe under all operative con-, ditions of the, carbureter, an opening from the fuel supply chamber communicating with the atmosphere, a valve in said opening, which is normally open and means for closing said valve for rendering effective.

the suction in said passage to draw fuel into the fuel supply chain er.

19. In a fuel feeding device for a carbureter, a fuel supply chamber, a fuel supply connection to the fuel supply chamber, an engine intakepipe, a passage from said pipe to the upper part of the fuel supply chamber, said passage communicating said chamber and pipe under all operative conditions of the carbureteiyan opening from the fuel supply chamber communicating with the atmosphere, a valve in said opening which is normally open, and float-controlled -means for closing'said valve for rendering effective the suction in said passage to draw fuel into the fuel supply chamber. 20. In a fuel feedin device for a carbureter, a fuel supply 0 amber, a fuel supply connection to the fuel supply chamber,

an engine intake pipe, a-passage fromsa1d pipe to the upper part-of the fuel supply chamber, said passage communicating said chamber and pipe under all operative conditions of the carbureter, an opening from the fuel supply chamber communicating with the atmosphere, a valve in said opening which is normally open, a float-controlled means for closing said'valve for rendering effective the suction in said passage to draw fuel into the fuel supply chamber, and a valve in said passage for controlling the suction therein.

21. In-a' fuel feeding device for a carbureter, a fuel'supply chamber, a fuel-supply connection to the fuel supply chamber, an engine intake pipe, a passage from said pipe to the upper part of the fuel supply chamber, a throttle in said intake pipe, and means operable by said throttle for'controlling the vacuum in said chamber. 7

' 22. In. a fuel feeding device for a carbureter, a fuelsupply chamber, a fuel sup- I ply connection to the fuel supply chamber, an' engine intake pipe, a passage from said pipe to theupper part of the fuel. supply chamber, a throttle in said intake pipe, and a valve in said passage operable by said throttle for controlling thevacuum insaid chamber.

23. In afuel ffeeding device for a carbureter, a fuel supply chamber, a fuel sup ply connection to the fuel supply chamber,

an engine intake pipe, a passage from; said pipe to the upper part of' the fuel supply chamber, a throttle in saidaintake pipe and a valve in said passage associated with said throttle and operable therewith to control the vacuum in said chamber.

PIERRE P.. GILLES. 

